The sucker bet. (n.) A small bet made with a strong hand to increase the pot size. Usually made knowing that other players intend to fold to a large bet, but are willing to stay in for the cheap.
Most players know this definition and may fold over cards and low pairs to avoid falling victim. This over compensation allows for the cheapest bluff in poker. I bet small every once and a while and the most common response goes something like this: "Now, that's a sucker bet! I'm not falling for that." And fold. They don't always state their thought process, but often they do. I suppose to show their "superior" read and justify their fold to a weak bet.
This tip works best against tight players, both passive and aggressive, and when you have established yourself as a tight player. I recommend it when you are heads-up and post-flop, best as a continuation bet. I tend to throw out my small bets when I have absolutely nothing.
Try it, you may be surprised at the results. It doesn't work all the time, but you are only losing a little more than you would have with a fold. The beauty of the sucker-sucker bet is that it doesn't have to have a high success rate to still be worth it.